Spare part hot-dip galvanizing process

Abstract

The invention discloses a spare part hot-dip galvanizing process. The spare part hot-dip galvanizing process comprises the steps of carbonizing to remove oil: carbonizing a hot forging part to removeoil by insulating the hot forging part with waste heat, and carbonizing a cold part to remove oil by burning of a continuous carbonizing furnace or gas flame; performing shot blasting: performing shotblasting on a workpiece to remove oxide skin from the surface of the workpiece; heating hydrogen to reduce: sending the workpiece to a reduction reaction channel, and heating the workpiece under thegas protection of reducing atmosphere, so that the temperature of the surface of the workpiece is increased to more than 600 DEG C, and reduction reaction occurs on the oxide layer of the surface of the workpiece; and performing dip plating: sending the workpiece to a container filled with liquid zinc through a discharge opening of the reduction reaction channel for dip plating, wherein the temperature of the liquid zinc is 420 to 580 DEG C. According to the spare part hot-dip galvanizing process, the production processes can be reduced, and severe pollution links of acid pickling, alkali washing, soaking in a plating support agent, drying after soaking in the plating support agent and soaking zinc with the plating support agent and subsequent waste liquid and waste water and waste gas treatment are omitted, so that the energy consumption is reduced, the pollution is reduced, the labor cost and the equipment cost are greatly reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a galvanizing process, in particular to a hot-dip galvanizing process for loose parts. Background technique [0002] Hot-dip galvanizing is to immerse the rust-removed steel components in a zinc solution that melts at a high temperature of about 500 ° C, so that the surface of the steel components is attached with a zinc layer, thereby achieving the purpose of anti-corrosion. Because of its long durability and stable quality, it is widely used in outdoor steel structures that are severely corroded by the atmosphere and difficult to maintain, such as a large number of transmission towers, communication towers, and components with high corrosion resistance requirements. In recent years, a large number of light steel structure systems, steel plates for automobiles, and various parts and components are also widely used for anti-corrosion, and they are playing an increasingly important role in anti-corrosion protection. [0003] At...

AI Technical Summary

Problems solved by technology

[0003] At present, the hot-dip galvanizing process in the prior art includes steps such as alkali washing and degreasing + water washing + pickling and rust removal + water washing + fluxing (dipping zinc ammonium chloride fluxing agent) + drying + dipping, in order to remove parts Oil stains, rust layers, and oxide layers on the surface, and to improve the state of the zinc liquid, use alkaline cleaning to remove oil, pickling to remove rust, cleaning, zinc chloride and ammonium-assisted plating and other chemical treatment links in the entire process, and there are the following problems: The process route is complicated, the production cost is high, and serious environmental protection problems inevitably arise, and the cost of environmental protection treatment is high